/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.catalina.ssi;

import java.io.PrintWriter;

/**
 * Implements the Server-side #set command
 * 
 * @author Paul Speed
 * @author Dan Sandberg
 * @author David Becker
 * @version $Revision: 531303 $, $Date: 2007-04-23 08:24:01 +0800 (星期一, 23 四月
 *          2007) $
 */
public class SSISet implements SSICommand {
	/**
	 * @see SSICommand
	 */
	public long process(SSIMediator ssiMediator, String commandName,
			String[] paramNames, String[] paramValues, PrintWriter writer)
			throws SSIStopProcessingException {
		long lastModified = 0;
		String errorMessage = ssiMediator.getConfigErrMsg();
		String variableName = null;
		for (int i = 0; i < paramNames.length; i++) {
			String paramName = paramNames[i];
			String paramValue = paramValues[i];
			if (paramName.equalsIgnoreCase("var")) {
				variableName = paramValue;
			} else if (paramName.equalsIgnoreCase("value")) {
				if (variableName != null) {
					String substitutedValue = ssiMediator
							.substituteVariables(paramValue);
					ssiMediator
							.setVariableValue(variableName, substitutedValue);
					lastModified = System.currentTimeMillis();
				} else {
					ssiMediator.log("#set--no variable specified");
					writer.write(errorMessage);
					throw new SSIStopProcessingException();
				}
			} else {
				ssiMediator.log("#set--Invalid attribute: " + paramName);
				writer.write(errorMessage);
				throw new SSIStopProcessingException();
			}
		}
		return lastModified;
	}
}